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公开(公告)号：US08760323B2
公开(公告)日：2014-06-24
申请号：US13822823
申请日：2011-09-07
摘要： An encoding device enables the amount of processing operations to be significantly reduced while minimizing deterioration in the quality of an output signal. This encoding device (101) encodes an input signal by determining the correlation between a first signal generated by using the input signal and a second signal generated by a predetermined method. An importance assessment unit (202) sets the importance of each of a plurality of processing units obtained by dividing the frames of the input signal. A CELP coder (203) performs sparse processing in which the amplitude value of a predetermined number of samples among multiple samples constituted by the first signal and/or the second signal in each processing unit is set to zero according to the importance that was set for each processing unit, and calculates the correlation between the first signal and the second signal, either of which was subjected to sparse processing.
摘要翻译： 编码装置使得可以显着减少处理操作量，同时最小化输出信号质量的劣化。 该编码装置（101）通过确定通过使用输入信号产生的第一信号和通过预定方法产生的第二信号之间的相关性来对输入信号进行编码。 重要性评估单元（202）设置通过划分输入信号的帧而获得的多个处理单元中的每个处理单元的重要性。 CELP编码器（203）执行稀疏处理，其中根据为每个处理单元中的第一信号和/或第二信号构成的多个样本中的预定数量样本的振幅值被设置为零，根据为 每个处理单元，并且计算第一信号和第二信号之间的相关性，其中任一个都进行稀疏处理。
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2.发明授权Spectral smoothing device, encoding device, decoding device, communication terminal device, base station device, and spectral smoothing method 有权光谱平滑装置，编码装置，解码装置，通信终端装置，基站装置和光谱平滑方法公开(公告)号：US08731909B2
公开(公告)日：2014-05-20
申请号：US13057454
申请日：2009-08-07
CPC分类号： G10L19/0204 , G10L19/0212 , G10L19/032 , G10L19/24 , G10L21/02
摘要： Disclosed is a spectral smoothing device with a structure whereby smoothing is performed after a nonlinear conversion has been performed for a spectrum calculated from an audio signal, and with which the amount of processing calculation is significantly reduced while maintaining excellent audio quality. With this spectral smoothing device, a sub band division unit (102) divides an input spectrum into multiple sub bands; a representative value calculation unit (103) calculates a representative value for each sub band using an arithmetic mean and a geometric mean; with respect to each representative value, a nonlinear conversion unit (104) performs a nonlinear conversion the characteristic of which is further emphasized as the value increases; and a smoothing unit (105) that smoothes the representative value which has undergone the nonlinear conversion for each sub band, at the frequency domain.
摘要翻译： 公开了一种光谱平滑装置，其具有在对从音频信号计算出的频谱进行非线性转换之后进行平滑处理，并且在保持优良音频质量的同时显着减少处理计算量的结构。 利用该频谱平滑装置，子带分割单元（102）将输入频谱划分成多个子频带; 代表值计算单元（103）使用算术平均值和几何平均值计算每个子带的代表值; 对于每个代表值，非线性转换单元（104）执行非线性转换，其特性随着值的增加被进一步强调; 以及平滑化单元（105），其以频域对每个子带进行了非线性转换的代表值进行平滑化。
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公开(公告)号：US08660851B2
公开(公告)日：2014-02-25
申请号：US13322202
申请日：2010-05-25
IPC分类号： G10L19/008
CPC分类号： G10L19/005 , G10L19/008
摘要： A decoding device reduces abrupt changes in the number of channels in a decoded signal when transmission errors occur as a result of lost frames in an encoding/decoding system for multichannel signals. In the device, a demultiplexer receives an encoded monaural signal and an encoded differential signal and detects change over time in the received encoded differential signal. An M signal decoder decodes the encoded monaural signal and obtains a decoded monaural signal. An S signal decoder decodes the encoded differential signal and obtains a decoded differential signal. A smoothing unit performs smoothing on the decoded differential signal by means of a computation involving the decoded differential signal and coefficients corresponding to the change over time detected by the demultiplexer. An L/R signal computation unit computes a decoded stereo signal from the decoded monaural signal and the smoothed decoded differential signal.
摘要翻译： 由于多通道信号的编码/解码系统中的丢失帧的结果，当传输错误发生时，解码装置减少解码信号中的信道数量的突然变化。 在该装置中，解复用器接收经编码的单声道信号和经编码的差分信号，并检测接收到的编码差分信号中随时间的变化。 M信号解码器解码编码的单声道信号并获得解码的单声道信号。 S信号解码器对编码的差分信号进行解码并获得解码的差分信号。 平滑单元通过涉及解码的差分信号的计算和对应于由解复用器检测到的随时间变化的系数对解码的差分信号进行平滑处理。 L / R信号计算单元从解码的单声道信号和平滑的解码的差分信号计算解码的立体声信号。
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4.发明授权公开(公告)号：US08554549B2
公开(公告)日：2013-10-08
申请号：US12528659
申请日：2008-02-29
IPC分类号： G10L19/12
CPC分类号： G10L19/00 , G10L19/005 , G10L19/02 , G10L19/0208 , G10L19/038 , G10L19/083 , G10L19/24 , G10L25/18
摘要： A voice encoding device accurately encodes a spectrum shape of a signal having a strong tonality such as a vowel. The device includes: a sub-band divider which divides a first layer error conversion coefficient to be encoded into M sub-bands so as to generate M sub-band conversion coefficients; a shape vector encoder which performs encoding on each of the M sub-band conversion coefficients so as to obtain M shape encoded information and calculates a target gain of each of the M sub-band conversion coefficients; a gain vector former which forms one gain vector by using M target gains; a gain vector encoder which encodes the gain vector so as to obtain gain encoded information; and a multiplexer which multiplexes the shape encoded information with the gain encoded information.
摘要翻译： 语音编码装置对具有强音调的信号（例如元音）的频谱形状进行精确编码。 该装置包括：子带分割器，将要编码的第一层错误转换系数分成M个子带，以产生M个子带转换系数; 形状矢量编码器，对M个子带变换系数中的每一个进行编码，以获得M个形状的编码信息，并计算M个子带转换系数中的每一个的目标增益; 通过使用M个目标增益形成一个增益矢量的增益矢量前者; 增益矢量编码器，其对所述增益矢量进行编码，以获得增益编码信息; 以及多路复用器，其将形状编码信息与增益编码信息进行复用。
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公开(公告)号：US20130124201A1
公开(公告)日：2013-05-16
申请号：US13703491
申请日：2011-06-07
IPC分类号： G10L19/008 , H03G3/20
CPC分类号： G10L19/008 , G10L19/0212 , G10L19/18 , G10L19/24 , G10L21/038 , H03G3/20
摘要： Disclosed is a decoding device which can efficiently encode/decode spectral data in a high pass section of a broadband signal. In the disclosed device: a sample group extraction unit (372) partially selects spectral components by means of an ease of selection importance which is the extent that the spectral components come close to the spectral component having the maximum amplitude value, in the spectrum of a high pass estimated by means of first parameters contained in second encoded information and bands most approximated to each of the spectrums of a plurality of sub-bands calculated from the spectrum of a second decode signal; a logarithmic gain application unit (373) applies second parameters to the partially selected spectral components; and an interpolation processing unit (374) applies third parameters which are adaptively set according to the value of the second parameters, to the spectral components which were not partially selected.
摘要翻译： 公开了一种可以在宽带信号的高通部分中有效地编码/解码频谱数据的解码装置。 在所公开的装置中：采样组提取单元（372）通过在频谱分量接近具有最大振幅值的频谱分量的范围内的选择重要性的方面来部分地选择频谱分量 通过第二编码信息中包含的第一参数和最接近于从第二解码信号的频谱计算出的多个子带的每个频谱的频带估计的高通; 对数增益应用单元（373）将第二参数应用于部分选择的频谱分量; 并且插值处理单元（374）将根据第二参数的值自适应地设定的第三参数应用于未被部分选择的频谱分量。
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6.发明申请公开(公告)号：US20130035943A1
公开(公告)日：2013-02-07
申请号：US13641493
申请日：2011-04-01
IPC分类号： G10L21/00
CPC分类号： G10L19/24 , G10L19/038 , G10L2019/0006
摘要： Disclosed is an encoding device capable of improving decoded signal quality. A local search unit (302) conducts a local search on a plurality of sub-bands generated by dividing spectrum data, and calculates lattice vectors for the spectra in the plurality of sub-bands. A multi-rate indexing unit (303) uses the lattice vectors to perform multi-rate indexing on each of the sub-bands, and generates indexing information showing the results thereof. A band selection unit (304) determines certain sub-bands from amongst the plurality of sub-bands in a plurality of encoding layers as perceptually important sub-band groups, where these are: within a selection range of sub-bands wherein the total number of encoding bits allocated to each of the plurality of sub-bands in the indexing information is equal to or less than an already set value, and within a sub-band selection range with the highest total energy of each of the plurality of sub-bands.
摘要翻译： 公开了能够提高解码信号质量的编码装置。 本地搜索单元（302）对通过分割频谱数据产生的多个子带进行局部搜索，并且计算多个子带中的频谱的格子向量。 多速率索引单元（303）使用格子向量对每个子带执行多速率索引，并生成表示其结果的索引信息。 频带选择单元（304）从多个编码层中的多个子频带中确定某些子频带，作为感知上重要的子频带组，其中它们是：在子频段的选择范围内，其中总数 分配给索引信息中的多个子带中的每一个的编码比特等于或小于已经设定的值，并且在多个子带中的每个子带的总能量最高的子带选择范围内 。
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公开(公告)号：US20120296640A1
公开(公告)日：2012-11-22
申请号：US13521112
申请日：2011-01-12
IPC分类号： G10L19/02
CPC分类号： G10L19/0208 , G10L19/032
摘要： Disclosed are an encoding device and encoding method capable of improving the quality of a decoded signal under very low bit rate conditions using a small amount of computation. A spectrum correction unit (302) performs correction processing on the subspectrum in each subband in such a manner that samples equal to or greater than a subspectrum average value are left unchanged while samples smaller than the subspectrum average value are replaced by zero. As a result of this, it is possible to significantly reduce the number of bits required to quantize the subspectrums without substantial reduction in quality in a local search unit (303) and in a multi-rate indexing unit (304).
摘要翻译： 公开了一种编码装置和编码方法，其能够使用少量的计算来在非常低的比特率条件下提高解码信号的质量。 频谱校正单元（302）以等于或大于子频谱平均值的样本在小于子频谱平均值的样本被零替换的方式对每个子带中的子频谱进行校正处理。 作为其结果，可以在本地搜索单元（303）和多速率分度单元（304）中显着地减少量化子频段所需的比特数量而不显着降低质量。
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公开(公告)号：US08306813B2
公开(公告)日：2012-11-06
申请号：US12528877
申请日：2008-02-29
IPC分类号： G10L21/00
CPC分类号： G10L19/032 , G10L19/0212 , G10L19/10
摘要： An encoding device reduces the encoding distortion as compared to the conventional technique and obtains a preferable sound quality for auditory sense. In the encoding device, a shape quantization unit quantizes the shape of an input spectrum with a small number of pulse positions and polarities. The shape quantization unit sets a pulse amplitude width to be searched later upon search of the pulse position to a value not greater than the pulse amplitude width which has been searched previously. A gain quantization unit calculates a gain of a pulse searched by the shape quantization unit for each of bands.
摘要翻译： 与常规技术相比，编码装置降低了编码失真，并且获得用于听觉的优选声音质量。 在编码装置中，形状量化单元以少量的脉冲位置和极性量化输入频谱的形状。 形状量化单元在将脉冲位置搜索到之后将要搜索的脉冲幅度宽度设置为不大于先前已经搜索的脉冲幅度宽度的值。 增益量化单元针对每个频带计算由形状量化单元搜索的脉冲的增益。
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公开(公告)号：US20120215527A1
公开(公告)日：2012-08-23
申请号：US13505093
申请日：2010-11-11
IPC分类号： G10L19/02
CPC分类号： G10L21/038 , G10L19/24
摘要： There is disclosed an encoder apparatus whereby, when a band expanding technique for encoding, based on the spectral data of a lower frequency portion, the spectral data of a higher frequency portion is applied to a lower layer in a hierarchical encoding/decoding system, an efficient encoding can be performed in an upper layer as well, thereby improving the decoded-signal quality. In an encoder apparatus (101), a second layer decoder unit (207) calculates a spectrum (differential spectrum), which is to be encoded in a third layer encoder unit (210) that is an upper layer of the second layer decoder unit (207), by applying such an ideal gain (first gain parameter a1) that minimizes the energy of the differential spectrum.
摘要翻译： 公开了一种编码器装置，其中当基于较低频率部分的频谱数据进行编码的频带扩展技术时，较高频率部分的频谱数据被应用于分级编码/解码系统中的较低层， 也可以在上层执行高效编码，从而提高解码信号质量。 在编码器装置（101）中，第二层解码单元（207）计算要在第二层解码器单元的上层的第三层编码器单元（210）中编码的频谱（差分频谱） 207），通过应用使差分频谱的能量最小化的理想增益（第一增益参数a1）。
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公开(公告)号：US20120203546A1
公开(公告)日：2012-08-09
申请号：US13501354
申请日：2010-10-13
申请人： Tomofumi Yamanashi
发明人： Tomofumi Yamanashi
IPC分类号： G10L19/14
CPC分类号： G10L19/24
摘要： Disclosed is an encoding device, wherein the energy information of a given layer is efficiently encoded using a scalable encoding method in which the band to be encoded is selected in each layer, and the quality of decoded signals can be enhanced. An encoding device (101) is equipped with: a second layer encoding unit (205) which generates a second layer encoded information included in which is the first band information of said band; a second layer decoding unit (206) which generates a first decoding signal by using the second layer encoded information; an adding unit (207) which generates a second input signal by using the first decoding signal; and a third layer encoding unit (208) which generates a third layer encoded information included in which is a second band information obtained by selecting a second band to be quantized in the second input signal, and a corrected gain (energy information).
摘要翻译： 公开了一种编码装置，其中使用其中在每个层中选择要编码的频带的可分级编码方法来有效地编码给定层的能量信息，并且可以提高解码信号的质量。 编码装置（101）装备有：第二层编码单元（205），其生成包括在其中的所述频带的第一频带信息的第二层编码信息; 第二层解码单元，通过使用第二层编码信息产生第一解码信号; 添加单元，其通过使用第一解码信号生成第二输入信号; 以及生成第三层编码信息的第三层编码单元（208），所述第三层编码信息是通过选择第二输入信号中要量化的第二频带和校正增益（能量信息）获得的第二频带信息。
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